WebAssembly / WebAssembly/wasi-webgpu

GPUCompilationMessage Using UTF-16

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Dominant language
Rust
Stars
220
Forks
15
PR merge metrics
No merged PRs in 30d

Description

The WebGPU spec expects GPUCompilationMessage.linePos/offset/length to be in UTF-16 (source). That makes perfect sense for JavaScript where all strings are UTF-16, including the WGSL strings.

In the case of wasm/wasi we don't know what language the user is going to be using, so assuming UTF-16 seems like a bad idea.

webgpu.h and wgpu both just use bytes (i.e. UTF-8 code units) instead. Should we opt for bytes as well?

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Research direction

Start with the WebGPU specification section linked for GPUCompilationMessage.linePos, offset, and length, then compare the corresponding definitions in webgpu.h and wgpu/src/api/shader_module.rs. Determine which unit representation the WASI API should expose and document the decision and its compatibility implications.

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Assessment

Tech stack
rust
Domain
api
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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